Reentrant isotropic – discotic nematic phase transition: a critical exponent study

Pressure-driven reentrant phenomena in liquid crystals: the role of inverse layer spacing

“…The above formulation provides a way to renormalise the N-S A transition temperature in terms of the couplings and l eff and the metastable temperature T 0 AN , Equation (11), whereas in earlier approaches, the renormalised N-S A transition temperature is derived in terms of only. This was due to the fact that in the low-pressure regime (in order to describe the pressure variation of the N-S A transition temperature), the pressure dependence was considered only in the parameters e 1 and b 1 and was neglected in b 2 .…”

“…The phenomenon of reentrant phase transition, that is an occurrence of a low symmetric phase in between two high symmetric phases, is intrinsically novel and the sustained interest in this problem is underlined by its discovery in amazingly diverse classes of condensed matter systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In achiral liquid crystals, the nematic (N)-partial bilayer smectic A ðS A d Þ-reentrant nematic (N R )-monolayer smectic A ðS A 1 Þ phase sequence was first reported by Cladis [18] in a mixture of {p-[p-hexyloxybenzylidene-amino] benzonitrile} (HBAB) and [N-p-cyanobenzylidene-pn-octyloxyaniline] (CBOOA).…”

Design, synthesis and characterization of a linear hydrogen bonded homologous series exhibiting reentrant smectic C ordering

“…1d. A re-entrant phenomenon in LCs is first reported by Cladis [31] and this paved way for its recognition and utility [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Occurrence of Re-Entrant phase can be attributed to the rupture of order parameter, which in turn alters the molecular arrangement in various phases as depicted in Fig.…”

Compared properties of textures of lyotropic mesophases of binary and ternary systems based on tetradecyltrimethyl ammonium bromide

“…Much of the investigation performed focused mainly on two features: the necessity from a solvent for amphiphilic assembly and what the structural properties of the aggregates formed in these media are [1]. The physical richness of these materials render them ideal for the examination of phase transition: they exhibit continuous and non continuous phase transitions and even apparent contradictory behavior is likely to be observed in their phase sequences [2]. Most physical properties of these materials are strongly dependent on the molecular orientation [3].…”